Configuration Guide User guide

1520 FastIron Configuration Guide
53-1002494-02
Global IP multicast parameters
Modifying IGMP (V1 and V2) membership time
The group membership time defines how long a group will remain active on an interface in the
absence of a group report.
To define an IGMP (V1 and V2) membership time of 240 seconds, enter the ip igmp
group-membership-time <num> command.
Brocade(config)#ip igmp group-membership-time 240
Syntax: ip igmp group-membership-time <num>
The <num> variable specifies the IGMP group membership time in number of seconds. Enter a
value from 20 through 7200 seconds. The value you enter must be a little more than two times the
query interval (2*query-interval +10). The default value is 260.
Modifying IGMP (V1 and V2) maximum response time
Maximum response time defines how long the Layer 3 switch will wait for an IGMP (V1 and V2)
response from an interface before concluding that the group member on that interface is down,
and then removing the interface from the group.
To change the IGMP (V1 and V2) maximum response time, enter the ip igmp max-response-time
<num> command at the global CONFIG level of the CLI.
Brocade(config)#ip igmp max-response-time 8
Syntax: [no] ip igmp max-response-time <num>
The <num> parameter specifies the IGMP maximum response time in number of seconds. Enter a
value from 1 through 10. The default is 10.
NOTE
Adding an interface to a multicast group
You can manually add an interface to a multicast group. This is useful in the following cases:
• Hosts attached to the interface are unable to add themselves as members of the group using
IGMP.
• There are no members for the group attached to the interface.
When you manually add an interface to a multicast group, the Brocade device forwards multicast
packets for the group but does not itself accept packets for the group.
You can manually add a multicast group to individual ports only. If the port is a member of a virtual
routing interface, you must add the ports to the group individually.
To manually add a port to a multicast group, enter a command such as the following at the
configuration level for the port.
Brocade(config-if-1/1)#ip igmp static-group 224.2.2.2
This command adds port 1/1 to multicast group 224.2.2.2.
To add a port that is a member of a virtual routing interface to a multicast group, enter a command
such as the following at the configuration level for the virtual routing interface.
Brocade(config-vif-1)#ip igmp static-group 224.2.2.2 ethernet 5/2
This command adds port 5/2 in virtual routing interface 1 to multicast group 224.2.2.2.